Suppose that we take 15 gay couples and observe the difference within couples in terms of age. Then we take 15 straight couples are record the same differences. We want to test if straight couples are more similar in age than gay couples. (There is some reason to expect that this is true.) What statistical procedure would be most appropriate?
a. computing a correlation coefficient for each couple
b. running an independent samples t test between gays and straights
c. running a t test for related samples
d. using a chi-square test
Question 2
If the experimenter had instead used an independent samples design with the same number of participants
a. the power of the design would have increased.
b. the power of the design would have decreased.
c. the power of the design would have stayed the same.
d. the power of the design would not be predictably affected.
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